ISYS111 Lecture Notes - Lecture 10: Mobile Computing, Mobile Commerce, Ultra-Wideband
25 May 2018
School
Department
Course
Professor
ISYS111 – Fundamentals of Business Information Systems
Week 10 Workshop
Essential question:
• How can business use wireless technologies, mobile computing and mobile
commerce to achieve their business goals?
Mobile computing:
• A real-time, wireless connection between a mobile device and other computing
environments such as the internet or intranet
• Wireless and mobile are not the same thing:
- Wireless means without wires and instead uses electromagnetic waves to
carry a signal
- Mobile refers to something that changes location over time
Pros and Cons of Wireless Media:
Channel
Advantages
Disadvantages
Microwave
• High bandwidth
• Inexpensive
• Must have an unobstructed
line of sight
• Can be impacted by
environmental interference
Satellite
• High bandwidth
• Covers large area
• Expensive
• Must have unobstructed line
of sight
• Signals experience
propagation delay
• Encryption needed for
security
Radio
• High bandwidth
• Can pass through walls
• Inexpensive installation
• Can create electrical
interference
• Not very secure
Infrared
• Low bandwidth
• Only covers short distances
• Must have an unobstructed
line of sight
Short Range Wireless Network:
• Bluetooth:
- Uses omnidirectional radio waves (waves emitted in all directions from a
transmitter)
- Max reach 800 FEET
- Links 8 devices MAX
- 50Mbps
- Used by:
▪ Mobile Phones
▪ PDAs
▪ Music Players
• Ultra-wideband (UWB):
- High bandwidth
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Mobile computing: a real-time, wireless connection between a mobile device and other computing environments such as the internet or intranet, wireless and mobile are not the same thing: Wireless means without wires and instead uses electromagnetic waves to carry a signal. Mobile refers to something that changes location over time. Infrared: high bandwidth, can pass through walls. Inexpensive installation: low bandwidth, only covers short distances. Uses omnidirectional radio waves (waves emitted in all directions from a transmitter) Used by: mobile phones, pdas, music players, ultra-wideband (uwb): Used by: streaming multimedia, locating multiple people and assets simultaneously, near-field communications (nfc): Used by: credit cards, embedded in mobile phones. Wireless access point connects to a wired lan or satellite dishes. Used by: wi-fi access in stores, search engines, wi-fi direct: Support peer-to-peer communications similar to bluetooth: mifi: A permanent wi-fi hotspot: super wi-fi: Creates long-distance wireless internet connections: wireless mesh networks: Use multiple wi-fi access points to create a wide area network.
